An interesting side-note: at my parents' house a few weeks ago, I found and flipped through an old Yiddish book. It had several oddities of script: although it used Yiddish vowel-letters, it also had Hebrew vowel-points. So a consonant followed by `ayin (used for /E/), also had a Hebrew /E/-vowel under it, etc. And it consistently failed to use final nun. At least, in the word "un" ("and") which is common enough; always a bent nun.Similar statements can be made about Hebrew final consonants (in particular, Yiddish uses a non-final p for -p, since final p means -f).
(The particular dialect apparently also pronounced "iz" as /uz/, since that's how they wrote it)
~mark
